Amplitude

Amplitude is a comprehensive digital analytics platform that combines product analytics, experimentation, session replay, and customer data management. The platform is designed to help teams understand user behavior across the entire customer journey, from acquisition through retention and monetization.

Amplitude's behavioral analytics include microscope (automatic anomaly detection), personas (behavioral clustering), and compass (correlation analysis for retention drivers). The platform now includes session replay, heatmaps, and an experimentation suite. Amplitude charges per Monthly Tracked User (MTU) with 10K MTUs free.

The Plus tier starts at $49/month and scales with MTUs (1,000 to 300,000). Growth tier has custom pricing typically ranging from $22,000 to $250,000+/year based on scale. Amplitude recently shifted from event-based to MTU-based pricing — if users generate lots of events per session, Amplitude costs less than Mixpanel; if you have many users with few events, Mixpanel costs less.